Manufacture of high speed steels



Patented July 30, 9.5

uN 'ran STATES PATENT OFFICE 2.209.623 MANUFAC URE or HIGH SPEED s'ranns Eduard Houdremont and Hans Schrader, Essen,

Germa y. assignors, Pantena Limited,

by mesne assignments, to Glarus, Switzerland, a corporation of Switzerland No Drawing. Original application February 24,

1938, Serial No.

192,289. Divided and this 8!!- plication April 18, 1939, Serial No. 268,524.

InGermany September 30, 1937 2 Claims.

The present invention relates to steels intended for the manufacture of high speed machining tools, this application being a division of our Patent No. 2,159,086. According to the inven- 5 tion such tools are. made of steel alloys which contain from 0.6 to 1.0% carbon, from 1.0 to

6.0% chromium, from- 1.0 to 76.0% molybdenum; from 1.0 to 3.0% vanadium and tungsten in a quantity amounting at least to 50% of the molybdenum content and ranging from. 1.0 to 4.0%.

the remainder substantially all iron with the normalimpurities. v

Steels of a composition as specified herelnbefore although they contain only small percentagesof alloying constituents are distinguished by a high efilciencyin the chip-removing working of materials and can be equal in this respect even to the high alloy high speed tungsten steels or, under favorable cutting conditions. even be a superior to them. The best results are obtained,

by steels which contain the alloying constituents within the following-limits:

(0!. 75-126) "0.6 to.1.0%, chromium from 3.0' to 6.0%, mo-

less than 5.0% molybdenum, 1.0-3.0% vanadium,

and tungsten in a quantity amounting at'least to of the molybdenum content and ranging from 1.0-4.0%, remainder substantially all iron with the normal impurities.

v 2. High speed steels composed of 0.6-1.0% carbon, 3.0-6.0%- chromium, 2.0 to 4.0% molybdenum, 204.0% vanadium and tungsten in a quantity amounting at least to 50% of the molybdenum content and ranging remainder substantially all iron with the normal impurities. v

. IDUARD' HOUDRmON'l.

' BOHRADER.

from 1.0-4.0%; 

